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The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon? | E. Aydi
; K. V. Sokolovsky
; J. S. Bright
; E. Tremou
; M. M. Nyamai
; A. Evans
; J. Strader
; L. Chomiuk
; G. Myers
; F-J. Hambsch
; K. L. Page
; D. A. H. Buckley
; C. E. Woodward
; F. M. Walter
; P. Mróz
; P. J. Vallely
; T. R. Geballe
; D. P. K. Banerjee
; R. D. Gehrz
; R. P. Fender
; M. Gromadzki
; A. Kawash
; C. Knigge
; K. Mukai
; U. Munari
; M. Orio
; V. A. R. M. Ribeiro
; J. L. Sokoloski
; S. Starrfield
; A. Udalski
; P. A. Woudt
; | Date: |
17 Aug 2021 | Abstract: | We present a detailed study of the 2019 outburst of the cataclysmic variable
V1047 Cen, which hosted a classical nova eruption in 2005. The peculiar
outburst occurred 14 years after the classical nova event, lasted for more than
400 days, and reached an amplitude of around 6 magnitudes in the optical. Early
spectral follow-up revealed what could be a dwarf nova (accretion disk
instability) outburst in a classical nova system. However, the outburst
duration, high velocity ($>$2000 km s$^{-1}$) features in the optical line
profiles, luminous optical emission, and the presence of prominent long-lasting
radio emission, together suggest a phenomenon more exotic and energetic than a
dwarf nova outburst. There are striking similarities between this V1047 Cen
outburst and those of "combination novae" in classical symbiotic stars. We
suggest that the outburst may have started as a dwarf nova that led to the
accretion of a massive disk, which in turn triggered enhanced nuclear shell
burning on the white dwarf and eventually led to generation of a wind/outflow.
From optical photometry we find a f{possible} orbital period of 8.36 days,
which supports the combination nova scenario and makes the system an
intermediate case between typical cataclysmic variables and classical symbiotic
binaries. If true, such a phenomenon would be the first of its kind to occur in
a system that has undergone a classical nova eruption and is intermediate
between cataclysmic variables and symbiotic binaries. | Source: | arXiv, 2108.07868 | Services: | Forum | Review | PDF | Favorites |
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